Heel attaching machine



June 14, 193s. i LAWSON 2,120,337

HEEL ATTACHING MACHINE Filed Feb. 6, 1957 2 Sheets-Sheet l I Elven/fon'Ziy Jllne 14, 0.1L. LAWSON HEEL ATTACHING MACHINE Filed Feb. 6, 1937 2Sheets-Sheet 2 [hue/Liar.' @ch 'X 4M Patented June 14, 1938 UNITEDSTATES Puffi-:1yrv OFFICE HEEL ATTACHING MACHINE Oscar L. Lawson, Lynn,Mass., assignor to National Development Company, Lynn, Mass., a.corporation of Massachusetts Application February 6, 1937, Serial No.124,435

' 6 Claims. (Cl. 12-125) machine of the invention is particularlyadapted for use in conjunction with the method of attaching heels toshoes described in my copending application Serial No. 102,367, ledSeptember 24, 1936.

Prior to the present invention it had been common practice to apply acement to the heel seat of the shoe and the heel and then hold the heelupon the shoe until the cement had dried by either a hand clamp or by atemporary eye bolt which passed through the last over which the shoe wasfitted. The eye bolt had to be removed before the last could be removedfrom the shoe. Both of these procedures were expensive because theyinvolved considerable-time consuming hand labor. The use of the eye boltnecessitated positioning the heel upon the shoe with the shoe right sideup and, consequently, it was diicult for the operator to position theheelraccurately upon the shoe.

The present invention contemplates a machine which reduces greatly thetime and labor necessary for attaching heels to shoes. The machine ofthe invention carries a plurality of pairs of cooperating clampingmembers each pair being adaptedgto clamp and hold a heel upon a shoeunder pressure. The construction is such that the shoe is supportedupside down While the heel is positioned and cemented upon the shoe. Thepairs of clamping members are carried by the machine, preferably, so asto be moved successively from a position where a heel is cemented andclamped upon a shoe and iinally returned to that position. Thearrangement is such that the heel is placed under pressure upon the shoebetween cooperating clamping members by depressing and releasing atreadle or lever. The clamping pressure is released automatically as theclamping members are returned to the above mentioned position.

The invention will be more clearly understood from the followingdescription in conjunction with the accompanying drawings: in which,

Fig. 1 is a plan view, partly broken away, of a machine embodying theinvention.

Fig. 2 is an elevational view of the same, partly broken away and partlyin section.

Fig. 3 is a sectional view, taken upon the line 3 3, of Fig. 2.

Fig. 4 is a fragmentary elevational view, partly broken away and partlyin section, of a portion of the machine, and

Fig. 5 is a fragmentary detail perspective view of a portion of themachine.

Before explaining in detail the present inven- .tion it is to beunderstood that the invention is not limited in its application to thedetails of construction and arrangement of parts illustrated in theaccompanying drawings, since the invention is capable of otherembodiments and of being practiced or carried out in various ways. Alsoit is to be understood that the phraseology or terminology employedherein is for the the purpose of description and not of limitation, andit is not intended to limit the invention claimed herein beyond therequirements of the prior art.

A machine embodying the invention as illustrated in the accompanyingdrawings comprises a frame I0 having a horizontal platform II. A hollowcylindrical boss I2 projects upwardly from the platform I I. A shaft I3is fitted in and secured to the boss I2 by a screw I4 and extendsupwardly for a considerable distance from the platform II. `A sleeve I5is rotatably mounted upon the shaft I3 and is provided at its lower endwith a radially extending ange I6 to which y I9. The plate I8 rests uponand slidably engages the upper end of the boss I2. A plurality of arms2li extend radially from the outer edge ofthe plate I8 and each carriesat its outer end a hollow vertically extending cylindrical guide 2|.

A hollow sleeve 25 is slidably movable within the guide 2l and hassecured in its upper end a last support 26 having a spindle 28 adaptedto engage a hole 29 in a wood shoe last 36 and support the last togetherwith a shoe upper 3l iitted thereupon. Preferably, the hole 29 in thelast 3! extends through the heel part and the last is constructed asdescribed in my copending application, Serial No. 102,366, filed Sept.24, 1936. A plunger 32 projects into the lower end of the sleeve 25 andis slidably movable therein. A collar 33 is iixed upon the plunger 32near its lower end and is provided with an ear 34. iA bolt 35 isrotatably `mounted in the ear 34 and is secured to one end of a pawl 36.kThe pawl 36 is prd-` Vided with a tooth 3l near its upper end adaptedto engage one of the teeth 3B and 39 formed upon the outer wall of theguide 2 I. A coil spring 40 ispositioned within the sleeve 25 with oneend abutting the inner end of the support 26 and its other end abuttingAwashers 4I resting upon the inner end of the plunger 32. The tooth 31upon the pawl 3`is urged into engagement with either of the teeth 38 and3S by a spring 42.

A block is secured by screws 46 upon the platform near its front edge41. The block 45 is provided with a groove in its top face for slidablyreceiving and guiding a slide 48. The slide is held in place by a plate49 secured upon the top face of the block 45 by screws 50. A curved arm5| projects from the forward end of the slide 48 and is provided with acam surface 52. The slide 48 normally is urged rearwardly by a spring 53having one end secured to the slide and its other end secured to theblock 45 by a screw 54. Rearward movement of the slide 48 is limited bya pin 55 projecting therefrom and adapted to engage the front edge ofthe block 45..

The upper end of the hub l5 is provided with a radially extending fiange68 to which a plate 6| is secured by bolts 62. Vertical displacement ofthe plate 68 is prevented by a washer 83 engaging the top of the plateand held in place by a bolt 64 fixed in the upper end of the shaft Theplate 6| is provided with a plurality i* the heel portion of the outsoleof the shoe 3l.

A shaft 15 is mounted for rotation in suitable bearings in the frame I8.A gear 15 is rotatably mounted upon the shaft 15 and meshes with apinion 11 fixed upon a shaft 18 which is mounted for rotation insuitable bearings in the frame I8. Power may be supplied from anysuitable source to rotate the shaft 18, as by a beltl engaging a pulley88 fixed upon the shaft 18. The ,hub 8| of the gear 18 is provided witha notch 83 in one face. A cam 84 is fixed upon the shaft 15 and thehubB8 of the cam is provided with an axially extending cavity 81 adapted toslidably receive a pin 88 having a cam surface 89. The pin 88 normallyis urged into the notch 83in the hub 8| by a spring 98. A plunger 8| isslidably mounted in a guide 92 carried by a bracket 92 fixed upon theframe i8. The plungcr 8| is provided with a tapered upper end 93 adaptedto project between the hubs 86 and 8| into the path of the cam surface89 on the pin 88. The lower end of the plunger 9| is pivotallylconnected to one end of an arm 94, the other end of which is pivotallyconnected upon a stud 85 fixed in the frame l. A spring S6, connected atone end to an intermediate point of the arm 94 and at its other end tothe frame I8, normally tends to maintain or move the plunger 8| betweenthe hub 8| and the hub 88 into the path of the cam surface 89 on the pin88. A rod 98 is connected at one end to an intermediate point of the arm94 and is connected at its other end to a foot treadle (not shown)whereby the plunger 9| may be moved out of the path of the cam surface89 by depressing the foot treadle and-permit the pin 88 to be forced bythe springv 98 into the notch 83 to provide a driving connection betweenthe gear 18 and the cam 84. A lever 99 is pivotally connected at one endupon a stud |80 on a bracket |80 fixed to the frame I and extendsforwardly so that its other end is movable into engagement with thelower end of the plunger 32. A roll or cam follower I8! is rotatablymounted upon a stud |82 fixed tc an intermediate point of the lever 99so that the roll IUI may engage the periphery of the cam 84.

A brake 82 resiliently engages the shaft 15 so as-to stop rotation ofthe latter when the driving connection to the gear 16 is disconnected.

In the use of the machine for cementing wood heels to shoes, the hub lis rotated to bring one of the arms 28 opposite the front edge 41 of theplatform If, in so doing, the tooth 31 happens to be in engagement withthe tooth 39 the upper end of the pawl 35 will engage the cam surface 52on the arm 5| thereby causing the pawl to move rearward against theaction ofthe spring 42 and at the same time the arm 5| will be caused tomove forward slightly against the action of the spring 53. However,before the upper end of the pawl reaches the end ofthe cam surface 52the pawl will have been moved rearward so as to bring the tooth 31.outof engagement with the tooth 39 whereupon the spring 48 will cause therod 32 carrying the pawl 35 to move downward. As the pawl 36 movesdownward, the spring 42 will urge it forward and bring the tooth 31 intoengagement with the tooth 38 to limit the downward movement of the pawl.

The operator then places the last 33 upon the spindle 28. Cement is thenapplied to either or both the heel seats of the heel 18 and the outsoleof the shoe 3|. The heel 10 is placed upon the outsole of the shoe inits proper position and the sleeve 25 then is allowed to move upwardlyby the action of the spring 48 so as to bring the bottom of the heel 18in engagement with the pad 69. The operator then steps upon the foottreadle to move the rod 98 downward and immediately releases his footfrom the foot treadle.A By depressing the foot treadle the operatorcauses the plunger 9| to move downward out of the path of the pin 88 soas to permit the latter to be moved by the spring 88 into the notch 83thereby effecting a driving connection between the gear 16 and the cam84. This causes the cam 84 to rotate one revolution whereupon the camsurface 89 engages the plunger 9| to cause the pin 88 to move out of thenotch 83 and disconnect the driving connection between the gear 16 andthe cam 84. As the cam 84 rotates its high point is brought intoengagement with the roll |0| to lift the free end of the lever 99 andmove the plunger 32 upward to compress the spring 48 and cause thelatter to press the heel 18 against the pad 69 with substantialpressure. As the plunger'32 is thus moved upward. the pawl 36 is causedto move upward and the tooth 31 is brought into engagement with thetooth 39 to prevent downward movement of the plunger 32 and to maintainthe spring 48 compressed. The operator then rotates the hub l5 to bringthe next adjacent arm 28 opposite the front edge 41 of the platform IIand the above described operations are repeated.

This procedure is repeated until the arm 20 carrying the shoe upon whichthe first heel was cemented is returned to a position opposite the frontedge 41 of the platform l. As this arm 28 approaches this position, theupper end of the pawl 36 is engaged by the cam surface 52 on the arm 5|to move the pawl rearward and bring the tooth 31 out of engagement withthe tooth 39 thereby permitting the spring 40 to move the pawl downwardand the spring 42 to move the tooth 31 into engagement with the tooth38. The pressure exerted by the spring 48 is thus relieved so that theoperator can move the sleeve 25 downwardly and remove the last 38 andshoe 3|. Another last and shoe is then placed upon the spindle 28 and aheel cemented to the outsole of the shoe.

It will be noted that the machine may carry ten shoes upon which heelshave been cemented and that each heel is maintained under pressure inthe machine while heels are being cemented upon the remaining nineshoes. During this time the cement has had suflicient time to harden andwhen each shoe is returned to the position to which the heel wascemented thereon the cement is thoroughly set and the shoe may beremoved without danger of displacing the heel.

I claim:

1. An apparatus for attaching heels to shoes comprising stationary andmovable portions, said movable portion carrying a pair of cooperatingclamping members including pressure applying means associated therewithfor holding a heel upon a shoe under pressure, means carried by saidstationary portion for actuating said pressure applying means,releasable means carried by said movable portion adapted to hold saidpressure applying means in either of a plurality of positions withrelation to said clamping members when moved to either of saidpositions, and means carried by said stationary portion for releasingsaid releasable means.

2. An apparatus for attaching heels to shoes comprising a pair ofclamping members having pressure applying means associated therewith forholding a heel upon a shoe under pressure between said members, meansfor carrying said clamping members along an endless path to and from agiven position therein and permitting said clamping members to remain atrest in said position, means operable at said position for actuatingsaid pressure applying means, and means operable as said clampingmembers approach said position for releasing said pressure applyingmeans.

3. An apparatus for attaching heels to shoes comprising stationary andmovable portions, said movable portion carrying a pair of cooperatingclamping members, one of said members carrying a shoe support movabletoward and away from the other clamping member, an element movabletoward and away from said shoe support between two positions, a springinterposed between said element and shoe support, means carried by saidstationary portion for moving said element toward said shoe support fromone of its said positions to the other to compress said spring whereby ashoe on said support is pressed against said other clamping member,means carried by one of said clamping members for locking said elementin either of said positions to prevent movement thereof by said spring,and means carried by said stationary portion for releasing said lockingmeans when said spring is compressed whereby said element is moved bysaid spring to the one of its said positions most remote from saidsupport.

4. An apparatus for attaching heels to shoes comprising stationary andmovable portions, said movable portion carrying a plurality of pairs ofcooperating clamping members, one of the clamping members of each ofsaid pairs carrying a shoe support movable toward and away from theother clamping member, an element movable toward and away from said shoesupport between two positions, a spring interposed between said elementand shoe support, means carried by said stationary portion for movingsaid element toward said shoe support from one of its said positions tothe other to compress said spring whereby a shoe on said support ispressed against said. other clamping member, means carried by one ofsaid clamping members for locking said element in either of saidpositions to prevent movement thereof by said spring, and means carriedby said stationary portion for releasing said locking means whensaid-spring is compressed whereby said elementis moved by said spring tothe one of its said positions most remote from said support.

5. In an apparatus for attaching heels to shoes, a pair of cooperatingclamping members, one of said members carrying a shoe support movabletoward and away from the other clamping member, an element movabletoward and away from said shoe support between two positions, means forlocking said element in either of said positions, and a springinterposed between said element and shoe support whereby a shoe on saidsupport is pressed against said other clamping member when said elementis in one of said positions.

6. In an apparatus for attaching heels to shoes, a pair of cooperatingclamping members, one of said members carrying a shoe support movabletoward and away from the other clamping member, an element movabletoward and away from said shoe support between two positions, a springinterposed between said element and shoe support whereby a shoe on saidsupport is pressed against said other clamping member when said elementis in one of said positions, means for locking said element in either ofsaid positions to prevent movement thereof in one direction by Saidspring.

OSCAR L. LAWSON.

